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Measurement and Instrumentation

Measurement and Instrumentation
Standard resistor ia made from

Platinum
Nichrome
Manganin
Silver

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Measurement and Instrumentation
The controlling torque of an indicating instrument ______ as the deflection of the moving system increases.

None of the listed here
Decreases
Increases
Remains same

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Measurement and Instrumentation
A moving coil of a meter has 100 turns, and a length and depth of 10 mm and 20 mm respectively. It is postioned in a uniform radial flux density of 200 mT. The coil carries a current of 50 mA. The torque on the coil is

 100 Nm.
 1 Nm.
 2 Nm.
  200 Nm.

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Measurement and Instrumentation
Which instrument has identical calibration for ac as well as dc values?

Moving coil type
Moving iron type
Hot wire type
Induction type

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Measurement and Instrumentation
The total current I = I1 + I2 in a circuit is measured as I1 = 150 ± 1A , I2 = 250 ± 2A, where the limits of error are as standard deviations. I is measured as

 (400 ± 3) A
 (400 ± 2.24) A
 (400 ± 1) A
 (400 ± 1.5) A

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Measurement and Instrumentation
An average reading digital multimeter reads 10 V when fed a triangular wave, symmetric about the axis. For the same input, an rms reading meter will read

 20√3.
 20.
  10√3.
 10.

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